Topic 8- Biological App To OCD

Question 1

PEEL 1
Family relates to OCD

Answer 1

P- A strength is the role of genetic factors is supported by family studies of OCD.
E- Nestadt found people with a first degree relative that has OCD are more at risk of developing it.
E- Families typically share environments as well as genes.
L- Meaning environmental factors could also play a part in the development of OCD.

Question 2

PEEL 2
Twin studies

Answer 2

P- Additional support for the role of genetics comes from twin studies.
E- Billett found a higher concordance rate for OCD in MZ than DZ twins.
E- But the concordance for MZ twins is never 100%.
L- Meaning environmental factors must play a role in OCD.

Question 3

PEEL 3
Brain structure for OCD

Answer 3

P- A strength is studies have demonstrated a genetic link to abnormalities in brain structure and patients with OCD.
E- People with OCD and the close relatives have reduced grey matter in brain regions.
E- Supporting the view that anatomical differences are inherited and can lead to OCD in some people.
L- Menzies suggested brain scans could be used as a way of detecting people’s risk of developing OCD.